- T.J. Howell
- 28.098 cm centimetre(s)
- United States (Baraboo)
The smallest unicycle ridden measures 28.09 cm (11.06 in) in height with a wheel diameter of 12.67 mm (0.49 in), achieved by T.J. Howell (USA) in Baraboo, Wisconsin, USA, on 12 November, 2015.
The attempt took place at the Civic Center in Baraboo, Wisconsin.